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From John Wilson <sami.hailu...@gmail.com>
Subject Optimistic mode with serializable vs read_committed
Date Tue, 03 Jul 2018 19:10:36 GMT
Hi,

I was reading this documentation,
https://www.gridgain.com/resources/blog/apache-ignite-transactions-architecture-concurrency-modes-and-isolation-levels,
to understand the difference between Optimistic mode with Serializable vs
read_committed. The only difference I see from the explanation given is
that for Serializable isolation, the "*primary nodes manage the transaction
requests internally*" before an ACK is sent to the coordinator while for
read_committed, the ACK is sent immediately and the nodes "*manage the
transaction requests internally*" later.

My question:


   1. What does "*primary nodes manage the transaction requests
internally"* exactly
   mean?
   2. What are the specific things a node has to do to manage transaction
   requests internally?

Thanks,
John

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